[Qgis-user] compute spatial derivatives from raster bands

[Alessandro Pasotti]

Hi,

QGIS core (the analysis library) do not expose such function directly, but
it does have methods to compute derivatives that are internally used by all
the "9 cells" algorithms (slope, aspect, ruggedness and hillshade) and the
derivative calculation is accelerated by OpenCL if available, exposing the
derivatives directly requires a small development but it is definitely
possible.

On Sat, Dec 29, 2018, 06:37 Lee Eddington <lee.w.eddington at gmail.com wrote:

> I’m fairly new to QGIS and would like to compute spatial derivatives
> (d/dx, d/dy) of raster band data.  Is there a tool, computational interface
> or plugin that does this already?
>
> Thanks,
> Lee
>
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